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A. P. HOWARD. APPARATUS POR HEATING THE AIR IN HEAT PLUES OI' BUILDINGS. No. 286,134.

Patented Oct. 2, 1883..

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UNITED STATES PATENT OFFICE. I

ALBION P. HOVARD, OF BROOKLYN, NEV YORK, ASSIGNOR OF ONEIIALF TO rIHOMAS D. MURPHY, OF SAME PLACE.

APPARATUS FOR HEATING THE AIR IN HEAT-FLUES 0F BUILDINGS.

SPECIFICATION forming part ofLetters Patent No. 286,134, dated October 2, 1883. Application filed April 6, 1883. (No model.)

To all whom it may concern:

Be it known that ALBION P. HOWARD, a citizen of the United States., residing at Brooklyn, E. D., in the county of Kings and State of New York, have invented anew and useful Apparatus for Heating the Air in Heat-Fines of Buildings, of which the following is a specitication.

This invention relates specifically to heating the Walls of and the air in heatdiues, wherein the bottom of the iiue is open for the entrance of the exterior air.

Heretofore in heating by 'indirect radiation the radiators have been placed at the entrance of the lues, Where they heat the air,- which is drawn up the flues and delivered through registers into the apartments. The defect in this method is that, as the bottom of the iiue is open and the dra-ft strong, the cold air is drawn into the iiue before it becomes heated to the proper temperature, and as there is no means of heating it after leaving the radiator it passes out into the apartment in its cold state. Another defect consists in the Waste of heat in heating the Walls of the fines, which become cold as soon a-s the supply of air is eut off from beloiv or the registers are closed above, in either of which cases the circulation of heated air in the flue is stopped.

The object of my invention is to obviate the above-mentioned defects; and it consists in providing the radiators for heating the air that enters the iiue with extensions, which are carried up the iiue, near to the top thereof, so as to convey the radiator-heat Within the fine its Whole length, and thereby insure the heating oi' all the air drawn into the flue and the walls of the ilue, and prevent cold air from being delivered into the apartment.

It further consists in arranging the radiators in sections, so that every flue will communicate with a separate section, and thereby prevent.

the heat from being drawn into the ilue having the greater draft.

In the accompanying drawings, Figure 1 represents a sectional front elevation of the interior of a building, showing the heating systemV and my improved mode of distributing and equalizing the heat. Fig. 2 is avertical transverse section of the same, taken on line x a' of Fig. 1.

Referring to the drawings, A A A represent a series oi' apartments on the several floors of a building, which are arranged to be heated by the radiator B, placed .in the basement C, and connected by a branch pipe, d, with a steam heating-pipe, D, leading from the boiler. E E E are the heat-fines leading to the several apartments AA A. rlhe said dues are open at the bottom and closed at the top above the registers in the Walls, through which the heat is delivered into the room. 'The object in inaking the ilues open at the bottom is to give free access to the air, which is preferably drawn entirely from the exterior.

rlhe radiator C may be oi' any suitable construction, and it is inclosed in a casing, F, in the usual Well-known manner, said casing also inclosing the entrance to the heat-lines. Air is supplied to the radiators from the exterior through a grated opening, b,wl1ich opens into a space, c, inclosed by a'partition, d. In the bottom ofthe easing Fis an opening, e, which may be closed by a slide, c, to regulate the admission of air to the radiators.

7o The radiator C is divided by partitions .f

the apartment with which that section c0111-,

municates. Each section of the radiator is provided with a branch pipe, h, which is earried into the iiue at the base, and connects With a head, t', from which extends a number of steam-pipes, H, the upper ends of which terminate at or near the top of the flue, where they are connected with another head, t. The steam from the radiators passes through the connecting-pipes h into the head i, and thence circulates through the pipes II the Whole length of each flue, While the water arising from the condensation oi' the steam `'flows back into the radiator, and thenceto the boiler` in the usual draft created by the ascending column of partially-heated air, is apt to be carried into the iiue before being heated by the radiator; and as there have been no means previous to my invention for heating the cold air after entering the fine, the cold air was drawn to the registers and delivered into the room; but by means of my invention, however rapidly the air may bedrawn in, it will be exposed, after entering the fine, to the heat of the eXtensionsfH, and

, thereby raised to the proper temperature before reaching the registers. Furthermore, the heat from the extensions H communicates heat to the walls of the flue and keeps the walls at a uniform temperature, so that the heated air is not absorbed byithe said walls. This is an 1mportant advantage, as when the registers Vare closed or the supply of air is cut off below,

the heat rapidly radiates from the walls of the ne and leaves them cold, `so that when the air is again admitted it requires considerable time to heat the lines again.

It will be observed that the extensions II are inclosed wholly within the heat-iiuesand are 3o not passed Vup through the'partitions closing the upper ends thereof, .whereby the heat in the extensions is prevented from being drawn out, and is utilized to keep the walls of the flue hot when the circulation of air in the iuc is stopped. Y

I claim- 1. In combination with the heat-hues having their tops closed and bottoms open, the vradiator B, provided with extensions H, said ex- 4o tensions being inclosed wholl y within the ilues, substantially as specified. f

3. In combination with the heat-fines, extensions H, lwholly inclosed in the lues, the radiator B, casing F, partition d, cold-air open- 4 5 ing b, and a suitable damper to control the supply of air, snbstantiallyas specied.

3. I-n` combination with the heat-rines of a' building, a steam-radiator divided into sections corresponding to the number of heat- 5o lues, and suitable pipes provided with a valve to connect the said section with the main steam-pipe, substantially as specified.

ALBION I. HOVARD.

Titnessesz JULrUs RUHwoLn'r, J. DoUGLAs BnowN. 

